body {
  margin: 0 auto;
  padding: 0;
  font-family: Microsoft YaHei;
  background-color: #e9e9e9;
  font-size: 100%;
}
@media all and (min-width: 640px) {
  body {
    width: 640px;
    margin: 0 auto;
  }
}
html,
h1,
h2,
h3,
h4,
h5,
dl,
dd,
dt,
ul,
li,
ol,
span,
p {
  margin: 0;
  padding: 0;
}
select {
  border: 0 none;
}
a {
  text-decoration: none;
}
input,
textarea,
select {
  outline: none;
  border: 0 none;
  padding: 0;
  margin: 0;
}
ul,
li {
  list-style: none;
}
button {
  outline: none;
}
.left {
  float: left;
}
.right {
  float: right;
}
.index {
  position: relative;
}
.header {
  width: 100%;
  font-size: 0;
}
.header img {
  width: 100%;
}
.menu {
  width: 100%;
  height: 2rem;
  line-height: 2rem;
  background-color: #0e78d2;
  text-align: center;
  border-bottom: 0.1875rem solid #0f5da3;
}
.menu ul {
  display: inline-block;
}
.menu ul li {
  float: left;
  margin: 0 0.25rem;
}
.menu ul li a {
  display: block;
  color: #fff;
  font-size: 0.5625rem;
}
.menu ul .on {
  border-bottom: 0.1875rem solid #fcbc26;
}